EP4551445A1 - Chariot de transport à roulettes suspendues doté d'un patin d'immobilisation - Google Patents
Chariot de transport à roulettes suspendues doté d'un patin d'immobilisationInfo
- Publication number
- EP4551445A1 EP4551445A1 EP23731271.5A EP23731271A EP4551445A1 EP 4551445 A1 EP4551445 A1 EP 4551445A1 EP 23731271 A EP23731271 A EP 23731271A EP 4551445 A1 EP4551445 A1 EP 4551445A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pedal
- pad
- immobilizing
- rotation
- connecting rod
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
- B62B5/00—Accessories or details specially adapted for hand carts
- B62B5/04—Braking mechanisms; Locking devices against movement
- B62B5/0433—Braking mechanisms; Locking devices against movement foot operated
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
- B62B5/00—Accessories or details specially adapted for hand carts
- B62B5/04—Braking mechanisms; Locking devices against movement
- B62B5/0485—Braking mechanisms; Locking devices against movement by braking on the running surface, e.g. the tyre
Definitions
- the present invention relates to a transport trolley with suspended casters equipped with an immobilizing pad.
- a transport cart according to the invention includes both a simple cart that can be pushed by hand, and a rolling base that can be pushed by hand and towable.
- Such a transport trolley comprises a horizontal rolling structure mounted on a plurality of casters each associated with a suspension. Different objects are placed on the rolling structure, then the cart is moved manually or by means of a motor to convey these objects to a specific destination in a facility. Such a displacement can be a few tens of meters, but can also reach several kilometers.
- This trolley may or may not include a guiding element in the form of a maneuvering bar, capable of orienting the trolley as it moves to reach the desired destination.
- a guiding element in the form of a maneuvering bar, capable of orienting the trolley as it moves to reach the desired destination.
- this trolley for example when loading or unloading it, it is imperative that said trolley be stabilized on the ground, otherwise this loading or unloading will be very complicated. . Indeed, during such operations, if the cart were free from any movement, it would be difficult to keep it still, and it would then make sudden and untimely movements in any direction, each time objects are loaded or unloaded.
- the trolleys are generally equipped with an immobilizing pad, the activation of which manual allows said pad which was initially placed above the ground, to be translated vertically downwards, to come into close support against said ground and constitute a blocking stop. Once this pad is in contact with the ground, it very slightly lifts the cart, preventing said cart from moving on the ground.
- a transport trolley according to the invention has suspension casters and has an immobilizing pad designed to be easily actuated, whatever the mass of the objects placed on the rolling structure of said transport trolley.
- the subject of the invention is a transport trolley comprising a rolling structure, suspended casters on which said rolling structure is mounted, an immobilizing pad and a mechanism for activating this immobilizing pad to prevent the trolley from moving on a floor via said suspended casters, characterized in that the mechanism for activating the immobilizing pad comprises:
- a locking pedal mounted to rotate around a first axis of rotation of the hollow main body, said locking pedal being able to pass by rotation from a deactivation position for which it extends horizontally to an activation position for which it extends vertically,
- All the elements present in the deployment mechanism of the immobilizing pad of a transport trolley according to the invention are dimensioned and are arranged together to allow the immobilizing pad to be deployed with reduced effort, whatever the weight of objects placed on the rolling structure.
- rotating the locking pedal to reach the activation position causes a rotation of the connecting rod, which will initially induce a lowering of the slide accompanied by a stretching of the first spring until until the immobilizing pad, initially above the ground, comes into contact with it.
- This lowering is carried out at the cost of a certain effort, because the stretching of the first spring goes against its natural tendency to compress.
- Rotation of the lock pedal continues after the lock pad reaches the ground, until the connecting rod and said locking pedal are aligned with one another in a substantially vertical direction.
- the first spring naturally compresses in the slide to try to return to its relaxed position, creating pressure between the ground and the underside of the rolling cart. It is essentially thanks to the natural compression of the first spring that the rolling base can be easily raised using the locking pedal. Depending on the weight of the objects placed on the rolling base, the compensator at the end of which the immobilizing pad is fixed, will fit more or less into the slide. It is essentially thanks to the natural compression of the first spring that the rolling structure can be easily raised by means of the locking pedal, without an operator having to make a significant effort to fight against the weight of the objects deposited. on the rolling structure.
- the slide and the tube are cylindrical in shape.
- the locking pedal is materialized by a rectilinear rod.
- the immobilizer pad when the lock pedal is in the disable position, the immobilizer pad is above the ground and has no specific function, and when said lock pedal is in the enable position , the immobilizing pad is in close contact with the ground to prevent any movement of the cart on said ground.
- the connecting rod comprises two spaced apart and parallel arms and the main body comprises two flat walls spaced apart and parallel, the two arms of the connecting rod enclosing the two parallel walls of the hollow main body.
- a connecting rod with two parallel arms is more robust than a connecting rod with only one arm.
- the connecting rod acts in a homogeneous and balanced manner within the deployment mechanism of the immobilizing pad.
- the locking pedal comprises two separate and parallel sections, the locking pedal being mounted on the main body by gripping the two arms of the connecting rod.
- a locking pedal with two parallel sections is more robust than a locking pedal with only one section.
- the locking pedal acts in a homogeneous and balanced manner within the deployment mechanism of the immobilizing pad.
- the locking pedal ends in a segment folded at right angles, said folded segment serving as a support surface for the foot of an operator wishing to pivot the locking pedal around the first axis of rotation towards the activation position.
- This segment, folded at a right angle, serves to facilitate the placing of an operator's foot against the locking pedal, in order to rotate said locking pedal.
- the first axis of rotation, the second axis of rotation and the third axis of rotation extend horizontally.
- the immobilizing pad is cylindrical and is fixed to one end of the cylindrical compensator by means of a screw.
- the immobilizing pad ideally extends the compensator without extending laterally from it.
- the thickness of the immobilizing pad is greater than or equal to 0.5mm so as to constitute a robust part that is unlikely to wear out quickly.
- the activation mechanism comprises an unlocking pedal pivotally mounted around a fourth axis of rotation of the main body and having a thrust pin, said mechanism comprising a second pre-loaded spring, one end of which is fixed to the main body and another end of which is fixed to the enlarged end of the slide, rotating the unlocking pedal around the fourth axis of rotation to deactivate the immobilizing pad causing the thrust pin to come into contact against the connecting rod, which then becomes misaligned with the locking pedal, the movement of the connecting rod being favored by compression of the second spring tending to return to its rest position and causing the slide to rise. Deactivation of the immobilizer pad could have been done using the locking pedal.
- the unlocking pedal is connected to the main body by means of a third pre-loaded spring requiring the application of a certain force on the unlocking pedal to overcome said third spring, when the release pedal unlocking is rotated around the fourth axis of rotation to deactivate the immobilizing pad.
- Another subject of the invention is a method of activating the immobilizing pad of a transport trolley according to the invention, the locking pedal being assumed to be in a deactivation position.
- the activation method comprises the following steps: -a step of rotating the locking pedal around the first axis of rotation from the deactivation position for which said pedal and the connecting rod are apart from each other on the other to form an open compass, this rotation being carried out by means of a push exerted by the foot of an operator on said locking pedal and causing a pivoting of the connecting rod around its two ends towards a vertical position, -a step of lowering the slide under the effect of the pivoting of the connecting rod until the immobilizing pad touches the ground, the first spring being preloaded until said immobilizing pad touches the ground, -a step of continuing to rotate the locking pedal while the immobilizing pad has already touched the ground, until the connecting rod arrives at the end of the stroke in a vertical position while being aligned with the locking pedal to form a closed compass, the first spring having initiated a compression phase just after the immobilizing pad has touched the ground, the slide continuing its lowering,
- Another subject of the invention is a method of deactivating the immobilizing pad of a transport trolley according to the invention, the locking pedal being assumed to be in an activation position.
- the deactivation process comprises the following steps:
- FIG. 1 is a side view of a locking pad mechanism of a transport trolley according to the invention
- FIG. 2 is an exploded perspective view of the mechanism of Figure 1,
- FIG. 3 is a perspective view of the mechanism of Figures 1 and 2, the locking pedal being deactivated
- FIG. 4 is a perspective view of the mechanism of Figure 3, the locking pedal being activated
- FIG. 5 is a transparent side view of a lower zone of the mechanism of Figure 4,
- FIG. 6 is a perspective view of an activation pad mechanism of a transport trolley according to the invention, showing an unlocking pedal,
- FIG. 7 is a perspective view from another angle of the mechanism of Figure 6,
- FIG. 8 is a side view of a locking pad mechanism of a transport trolley according to the invention, the locking pedal not being activated
- FIG. 9 is a sectional view of the mechanism of Figure 8.
- FIG. 10 is a side view of a locking pad mechanism of a transport trolley according to the invention, the locking pedal being activated and said trolley being empty,
- FIG. 11 is a sectional view of the mechanism of Figure 10,
- FIG. 12 is a side view of a locking pad mechanism of a transport trolley according to the invention, the locking pedal being activated and said trolley being loaded,
- FIG. 13 is a sectional view of the mechanism of Figure 8.
- a transport trolley 50 according to the invention comprises a rolling structure 1 mounted on a plurality of casters 51 each associated with a suspension 52.
- the rolling structure 1 is flat and horizontal, and is intended to be loaded with objects, which will be conveyed to a specific destination of an installation, via a movement of the transport trolley 50.
- This rolling structure 1 can for example be tubular so as to lighten the transport trolley 50.
- This trolley of transport 50 may or may not be equipped with a guiding element such as for example a maneuvering bar 53 also called a handrail, to orient the carriage 50 during its movement.
- the trolley 50 is caused to roll on the ground by means of its suspended casters 51, 52.
- this type of trolley 50 due to the presence of the suspended casters 51, 52 can be lowered significantly, that is to say by a few centimeters, if the objects to be transported and which have been placed on the rolling structure 1 are heavy, typically greater than several hundred kilograms.
- an immobilizing pad is made complicated on such a cart 50, due to the presence of suspended casters 51, 52 which contribute to lowering significantly, typically by a few centimeters, the rolling structure 1 when it is loaded with heavy objects. Indeed, lifting the carriage 50 to make the immobilization pad effective can be made complicated or even impossible because of the significant mass of the carriage 50 due to the presence of these heavy objects.
- a cart 50 according to the invention comprises a structure rolling wheel 1 mounted on suspension casters 51, 52, and a deployment mechanism of said immobilizing pad 10 comprising:
- the connecting rod 4 comprises two spaced apart arms 11, 12 and parallel, said two arms being connected to each other by means of a flange 13.
- the connecting rod 4 comprising the two spaced arms 11, 12 and the flange 13 is made in a single piece made of the same material.
- the two arms 11, 12 are planar and thin, and the flange 13 has three walls of thin thickness, two side walls of which are parallel and each extend an arm 11, 12 and a connecting wall of which connects said two side walls in extending perpendicular to them.
- the locking pedal 5 comprises two separate and parallel sections 14, 15, each ending in a folded segment 16 at approximately 90°, said two folded segments 16 being connected to each other by means of a connecting segment 17.
- the two folded segments 16 and the connecting segment 17 delimit a terminal frame against which the foot of an operator will exert pressure to move said locking pedal 5 in order to deploy the immobilizing pad 10.
- the locking pedal locking 5 is mounted in rotation around a first axis of rotation 18 of the main body 3. More precisely, the main body 3 is delimited by two parallel side walls, and the first axis 18 of rotation emerges from an upper zone of surfaces external of said two side walls.
- the connecting rod 4 is mounted to rotate around a second axis of rotation 19 carried by the locking pedal 5, said second axis 19 emerging from external surfaces of the two sections 14, 15 of said locking pedal 5.
- the first axis of rotation 18 and the second axis of rotation 19 are parallel and extend horizontally.
- the pedal locking 5, the connecting rod 4 and the hollow main body 3 are arranged together in such a way that:
- the locking pedal 5 is mounted for rotation on the main body 3 around the first axis of rotation 18, and the connecting rod 4 is mounted for rotation on the locking pedal 5 around the second axis of rotation 19 so that it is found between the main body 3 and the locking pedal 5.
- the slide 7 is a hollow cylindrical part whose one end considered along its axis of revolution ends in an enlarged collar 20.
- a rod 21 around from which the first spring 22 extends, is inserted into the slide 7.
- the first spring 22 is free to be compressed or to be stretched along the rod 21.
- a cylindrical stop 23 is fixed to the first spring 22, being placed around said first spring 22.
- the main body 3 originates on a lower surface of the rolling structure 1 and extends downwards under said rolling structure 1, in a vertical direction.
- Each arm 11, 12 of the connecting rod 4 has an upper end which is mounted to rotate around the second axis of rotation 19 of the locking pedal 5, and a lower end which is mounted to rotate around a third axis of rotation 24 passing through the enlarged flange 20 of the end of the slide 7.
- the upper end and the lower end of each arm 11, 12 of the connecting rod 4 are to be considered along a longitudinal axis of the connecting rod, said upper end being placed above the lower end.
- the compensator 9 is a hollow cylindrical part and the shoe immobilizer 10 is a solid cylindrical part whose diameter is substantially equal to the diameter of the compensator 9.
- the immobilization shoe 10 is screwed to one end of the compensator 9.
- the compensator 9 is introduced into the slide 7, so that the immobilizing shoe 10 emerges from the enlarged flange 20 of said slide 7, said compensator 9 finding itself at least partly included in said slide 7 while surrounding the first spring 22.
- the locking pedal 5 can occupy a deactivation position for which the immobilizing pad 10 is not activated.
- the locking pedal 5 extends horizontally and the immobilizing pad IO is placed above the ground without being in contact with it.
- the connecting rod 4 and the locking pedal 5 form an open compass, the axis of rotation of which would be materialized by the second axis of rotation 19 around which the connecting rod 4 pivots.
- the connecting rod 4 and the locking pedal form between them an angle which is greater than 90°.
- the first spring 22 which was previously put under stress, naturally compresses in an attempt to return to its relaxed position, leading to retraction of the compensator 9 fitted with the immobilizing pad 10 in the slide 7.
- the compression of the first spring 22 facilitates the deployment of the immobilizing pad 10 thanks to pressurization of said immobilizing pad 10 on the ground.
- the compression of the first spring 22 is not 100% compression, since it is the suspensions 52 of the casters 51 of the transport trolley 50 which are compressed to the maximum and which provide a mechanical stop for the rolling base 1.
- the deployment mechanism of the immobilizing pad 10 comprises an unlocking pedal 6 to deactivate said immobilizing pad 10.
- the deactivation of the immobilizing pad immobilization 10 could have been done by causing a rotation in the opposite direction to the locking pedal 5.
- the locking pedal 5 has reached the activation position, it becomes very difficult to maneuver because it would be necessary for the foot of the operator passes under the locking pedal 5 to be able to exert pressure on it, in order to trigger this rotational movement in the opposite direction.
- the locking pedal 5 is so low that inserting the foot between it and the ground could only be carried out at the cost of a great effort which would risk leading to an injury of the foot.
- the unlocking pedal 6 consists of an elongated rod 25, including:
- -a first end is mounted to rotate around a fourth axis of rotation 26 secured to the main body 6 in a lower zone thereof, said fourth axis of rotation 26 being placed under the first axis of rotation 18 around which is mounted in rotation the locking pedal 5, and -a second end ends in a segment 27 folded at 90°, said folded segment being intended to serve as a support surface for the foot of an operator wishing to activate this pedal. unlocking 6.
- the first end of the rod 25 constituting the unlocking pedal 6, carries a lever arm 28 which extends perpendicular to a longitudinal axis of the rod 25, and which extends perpendicular to the folded segment 27 of the second end of said rod 25.
- This lever arm 28 carries a thrust pin 29 which is parallel to the fourth axis 26 of rotation, this thrust pin 29 being cylindrical and elongate.
- a second spring 30 connects an upper zone of the main body 3 to the enlarged flange 20 of the slide 7, said second spring 30 being pre-stressed by being stretched, and therefore tending to naturally compress to return to a relaxed position.
- the unlocking pedal 6 has a secondary rod 31 extending parallel to the lever arm 28 and having a length equal to that of said lever arm 28.
- the unlocking pedal 6 is mounted in the deployment mechanism of the immobilizing pad 10 via a third spring 32 connecting an upper zone of the main body 3 to a free end of the secondary rod 31.
- a method of deactivating the immobilizing pad 10 by means of the unlocking pedal 6 comprises the following steps: - a step of rotating the unlocking pedal 6 around the fourth axis of rotation 26 by means of a thrust exerted by the foot of a operator on the folded segment 27 of said unlocking pedal 6, the connecting rod 4 being aligned along the locking pedal 5,
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Handcart (AREA)
Abstract
Description
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| MA71366A MA71366A (fr) | 2022-07-07 | 2023-06-07 | Chariot de transport à roulettes suspendues doté d'un patin d'immobilisation |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2206939A FR3137646B1 (fr) | 2022-07-07 | 2022-07-07 | chariot de transport à roulettes suspendues doté d’un patin d’immobilisation |
| PCT/EP2023/065216 WO2024008379A1 (fr) | 2022-07-07 | 2023-06-07 | Chariot de transport à roulettes suspendues doté d'un patin d'immobilisation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP4551445A1 true EP4551445A1 (fr) | 2025-05-14 |
| EP4551445B1 EP4551445B1 (fr) | 2026-03-25 |
Family
ID=83594183
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP23731271.5A Active EP4551445B1 (fr) | 2022-07-07 | 2023-06-07 | Chariot de transport à roulettes suspendues doté d'un patin d'immobilisation |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP4551445B1 (fr) |
| FR (1) | FR3137646B1 (fr) |
| MA (1) | MA71366A (fr) |
| WO (1) | WO2024008379A1 (fr) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20250256688A1 (en) * | 2024-02-09 | 2025-08-14 | Toyota Motor Engineering & Manufacturing North America, Inc. | Dolly apparatuses including synchronization devices |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2712366A (en) * | 1951-07-07 | 1955-07-05 | Faultless Caster Corp | Truck lock |
| JPS59151870U (ja) * | 1983-03-31 | 1984-10-11 | 花岡車輌株式会社 | 手押式運搬車 |
| US7216399B2 (en) * | 2004-10-08 | 2007-05-15 | Vestil Manufacturing Company | Caster brake |
| CN102923375B (zh) * | 2012-10-24 | 2015-03-11 | 上海鸿研物流技术有限公司 | 一种带止动装置的可移动式大型周转箱 |
| CN106931280A (zh) * | 2017-03-27 | 2017-07-07 | 安徽江淮汽车集团股份有限公司 | 一种检具支撑装置 |
-
2022
- 2022-07-07 FR FR2206939A patent/FR3137646B1/fr active Active
-
2023
- 2023-06-07 MA MA71366A patent/MA71366A/fr unknown
- 2023-06-07 WO PCT/EP2023/065216 patent/WO2024008379A1/fr not_active Ceased
- 2023-06-07 EP EP23731271.5A patent/EP4551445B1/fr active Active
Also Published As
| Publication number | Publication date |
|---|---|
| WO2024008379A1 (fr) | 2024-01-11 |
| EP4551445B1 (fr) | 2026-03-25 |
| FR3137646A1 (fr) | 2024-01-12 |
| FR3137646B1 (fr) | 2024-07-26 |
| MA71366A (fr) | 2025-04-30 |
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